Bianshanhan [farming]

Can't see what's going on in the cave from the outside, so Li Qingwen poked his probe inside and touched the surrounding stone walls, but it was hard, not weathered or falling off.

Even so, he didn't dare to go in, fearing that it would collapse or something would jump out and be bitten again.

Remembering the location of the cave entrance, Li Qingwen rode Tianzao back.

This river is very wide, and there are many logs washed down from the upper reaches of the bank, which have been piled up on the bank for many years. Many of them have rotted long ago. If you chop them with an ax, you can get a lot of fire.

Of course, there are also some oily woods that are not easy to soak in water and are still hard. If the wood is easy to plan, just plan it out and put it directly on the fire to burn more vigorously.

At this time, there was a piece of pine wood crackling and burning, and an iron pot was supported on it, and the fragrant fish soup was tumbling in the iron pot.

Even though several piles of pike had been caught, Li Qingfeng didn't feel bored at all, and kept pulling the stick. The pike in this season didn't grow any more, and they would eat those small fish under the water every day. It's just that, I'm afraid it will eat several catties a day, and he has to kill the fish.

Qi Min didn't see Li Qingwen's shadow for a long time. Qi Min was about to go out to find someone, and then he saw him coming back on horseback.

"Boy, would you like some fish soup?" Qi Min greeted.

Li Qingwen dismounted, and Qi Min came over with steaming hot soup. While drinking, Li Qingwen said that he found a cave over there, and asked them if they wanted to go and explore together.

Hearing this, Li Qingfeng finally raised his head, reluctantly put down the fishing rod in his hand, "Let's go!"

After digging a lot of firewood, Lao Sun and Qi Min were about to take a rest, when they heard this, they became interested. They picked up a bundle of pine branches on the ground, put them on the horse, and brought steel knives and sticks, and the four of them rode together. cross the river.

As he walked, Qi Min couldn't help but said: "Zai'er, you ran so far, don't be alone next time, it's better to ask someone to follow."

Li Qingwen let out a "hmm". In fact, this place is only about ten miles away from the river, so he didn't think it was that far.

Qi Min took a look at him, and felt that babysitting is really not an easy task. If someone is disobedient like Ma Yongjiang, just tie them up. Li Qingwen is very honest most of the time, and will come up with something out of the blue , It is really hard to guard against.

When the group arrived at the entrance of the dug-out cave, Qi Min felt relieved again, at least Li Qingwen didn't just sneak in without saying a word.

Li Qingfeng was naturally interested in this kind of place, and he had already put the fish and other things on the cloud. He looked at the entrance of the cave, and said with certainty: "It must be more than this one."

Lao Sun and Qi Min also nodded in agreement. They climbed up the rock and looked up. The northwest area is full of rolling mountains. The one under their feet is almost the shortest, barely counting as the foot of the mountain.

This stretch of land can't be seen, with a radius of dozens or even hundreds of miles, it is really difficult to find the openings of the caves one by one.

The four of them rode horses around several times, but they didn't see the second hole. Instead, they saw traces of a few slopes slipping down. Is the opening of the hole blocked?

Not wanting to procrastinate any longer, when Li Qingfeng came back, he took off his outer leather robe, tied his trouser legs tightly, and wanted to go into the cave to have a look.

Li Qingwen grabbed him, "Wait, light the torch first, little brother, why are you taking off your clothes?"

"I'm afraid the leather will be scratched by the stones inside." Li Qingfeng watched Lao Sun light the fire on the ground, and also took a few pine branches and set it on the fire.

Li Qingwen put the clothes back on for him, "Sew them up again if they are torn, and you will get hurt if you scrape the flesh."

When entering this kind of cave, one is afraid of collapsing, the other is afraid of some poison inside, and the third is afraid of suffocation.

Li Qingwen threw the lit torch into the cave vigorously, and the pine branch fell dozens of steps away, still burning.

After waiting for a long time, there was no movement inside, and the latter two dangers were ruled out for the time being. The four of them discussed it and decided to go in a distance to have a look.

The horses were tied outside, and the four of them held torches, carried pockets, and tucked pine branches under their armpits, and walked in with cats on their waists.

There was only half a person at the entrance of the cave, and it got wider and wider as it went in. When it reached a torch, Li Qingwen could straighten up.

Most of the first torch was still unburned, so I didn't pick it up. I threw the second one forward. After landing, I saw that the fire was not extinguished, and there was no other movement, so I continued to move forward.

Here, everyone can stretch their bodies.

Li Qingwen kept scratching the stone wall, touched a slightly smooth crystal surface, rubbed it with his hand, and even wiped off the dross...

Quickly rub the dross off your fingers and move on.

There is no dust here, and there is no peculiar smell. I use a torch to illuminate the surroundings, and there are traces of excavation. Both Qi Min and Lao Sun said that it might be a mine.

I just don't know what it is.

Li Qingfeng was shocked when he heard that, he thought there might be gold or silver in it.

It's just that when they inspected the stone wall carefully, there was nothing special about the stone on it. Qi Min suddenly sighed, "It would be great if Jiang Cong was here."

He is well-informed, skilled, bold and careful, and he can at least half rest assured that Jiang Cong is there when he drills into an unfamiliar cave.

Li Qingwen didn't say anything.

Qi Min wondered why Li Qingwen was so quiet. When he turned his head, he saw a place on the wall behind him glowing slightly. He was startled, stopped quickly, and said, "What is that?"

Everyone turned their heads, only to see the shadows of a few people cast by the torches on the cave, but nothing else.

Qi Min rubbed his eyes, looked again, there was no light, and wondered in his heart, could it be that his eyes were dazzled?

Li Qingwen: "What did you just see?"

"There is a place half a foot above the ground that emits a blue light."

Li Qingwen walked back a dozen steps, Qi Min said: "Yes, yes, that's it!"

Shining the torch on the wall, Li Qingwen saw two shiny surfaces with the size of fingertips. He stretched out his hand to touch them, and rubbed them together. Then, some debris fell from the side, revealing a bigger shiny surface.

This is where he touched it just now.

After rubbing it, a few people gathered together to watch it, and it seemed that there was nothing different.

Li Qingwen asked Qi Min to take the torches of the four people away, and when the light from the torches dissipated, strands of fluorescent light slowly appeared on the wall.

The light is not very obvious, but it is only dark in the hole that can be seen clearly.

It glows when rubbed against it, Li Qingwen said, "It seems to be fluorite."

Lao Sun nodded, called Qi Min back, and said with a little disappointment, "It should be a fluorite mine."

Fluorite is very common. It can be found in many counties and counties in the mountains. There is a porcelain maker in Hongzhou who will add fluorite to the glaze.

Li Qingfeng asked if it was worth the money, Qi Min and Lao Sun shook their heads.

Soon, the blue light disappeared again, and the stone wall returned to a dark appearance.

Although curious, no one dared to pick up the stone on the wall. If the cave was collapsed, they would be buried alive in it.

Li Qingfeng's short-lived sweet dream was shattered, but the good news is that in front of him was a hollowed-out mountain belly. The four of them walked around the mountain belly and saw nothing except the ground and four walls that had been dug. There were no extra sticks or dirt, and no other holes were found.

Li Qingwen shook the empty bag away, kicked it to the ground and picked up the stones. According to the textbooks he had learned, fluorite was very useful in chemical engineering and smelting, but it was useless in this era of low technological level.

Li Qingwen didn't understand it very well, but there was no human habitation nearby. This mine should have been built a long time ago.

No matter what, take it back and study it.

Seeing him picking up stones, Li Qingfeng also bent down, and he came, and it was not in vain to go back empty-handed.

Qi Min and Lao Sun almost thought the same way.

In this way, four people came out of the cave again carrying a bag of stones.

The cave is neither big nor small, and after walking more than 100 steps, we arrived outside. Four horses were still wagging their tails and eating dry grass.

The four of them rode back, and Li Qingwen was the last. He looked back at the undulating mountains behind him, like a giant beast lying down in the white snow.

Passing the river and returning to their camp, the two ice holes where Li Qingfeng was fishing were frozen again, he threw the stones and went to dig holes again.

The pine wood on the shore was still burning, and the fish sticking beside it were all roasted. The four of them sat by the fire and began to eat big mouthfuls.

To fill his stomach, Li Qingwen dug out a piece of wood with Qi Min and the others. Before it was dark, he practiced arrows for a while, and when the sun went down, he read a book by the firelight.

The tent was set up long ago, and the surrounding snow was swept clean. Even if there were four people, they had to take turns to watch the night. There was no moon today, and two fires were specially lit outside.

In order to take care of the two brothers, Li Qingwen and let them keep watch in the middle of the night, Li Qingfeng hung the shoes and socks of the four of them by the fire to roast. He didn't let his younger brother do anything, so Li Qingwen memorized about thirty pages of books.

After midnight, Qi Min and Lao Sun woke up, and they went back to rest. Li Qingwen was lying in his sleeping bag, and just when he closed his eyes, Li Qingfeng suddenly fell to his feet, "Boy, it's on fire!"

Li Qingwen was so frightened that he didn't feel sleepy at all, and he didn't care whether it was cold or not, so he crawled outside from his sleeping bag.

Qi Min and Lao Sun also ran in, and then saw a piece of red beside the bedding, blinked their eyes vigorously, it seemed that it was not fire, but red light.

Li Qingfeng pounced, his chest hurting, he also realized that he had made a mistake, clapped his hands and stood up.

As soon as the tent was opened, the cold wind blew in. Li Qingwen shrunk his shoulders and pulled the robe over his body. Li Qingfeng lifted the sleeping bag, revealing a bag made of hemp rope. He thought the fire was the red light from the bag.

Inside the bag are stones picked up from the cave.

Four people squatted on the ground, the poured fluorite glowed faintly, some were crystal clear, some were faint, and there were only a few lights on a stone...

Not only is it red, but there are green ones underneath.

Li Qingwen picked up a fluorite the size of an egg. The surface was rough, but the light it emitted was a very pure light green.

Qi Min and Lao Sun stared straight at the eyes, "Ye Mingzhu?"

The author has something to say:

Fluorite may glow when heated or absorb sunlight or ultraviolet light